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Derivatives - Additional Information (Detail) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) Derivatives | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) Derivatives | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Risk participation Agreements [Line Items] |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | $ (160) | $ (45) | $ (2,122) | $ (88) |
Risk Participation Agreements Purchased [Domain] |  |  |  |  |
Risk participation Agreements [Line Items] |  |  |  |  |
Number of interest rate swaps | Derivatives | 38 |  | 38 |  |
Risk Participation Agreements Sold [Domain] |  |  |  |  |
Risk participation Agreements [Line Items] |  |  |  |  |
Number of interest rate swaps | Derivatives | 14 |  | 14 |  |
Interest Rate Swap [Member] |  |  |  |  |
Risk participation Agreements [Line Items] |  |  |  |  |
Derivative Instruments Designated As Hedging Instruments Interest Income | $ 0 | 0 | $ 0 | (118) |
Derivative Instruments Designated As Hedging Instruments Interest Expense | 208 | (70) | 219 | (70) |
Derivative, Net Hedge Ineffectiveness Gain (Loss) | 0 | 0 | 0 | 7 |
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |
Risk participation Agreements [Line Items] |  |  |  |  |
Derivative, Fair Value, Net | 4,091 |  | 4,091 |  | $ (801)
Derivative, Notional Amount | 70,000 |  | 70,000 |  | 70,000
Forward Contracts [Member] |  |  |  |  |
Risk participation Agreements [Line Items] |  |  |  |  |
Derivative, Net Hedge Ineffectiveness Gain (Loss) | 0 | 0 | 0 | 0 |
Derivative Liability, Cost Basis, Gross Asset | 21,200 |  | 21,200 |  | 9,800
Derivative Liability, Fair Value, Gross Asset | 24,500 |  | 24,500 |  | 10,700
Derivative Liability, Notional Amount, Gross Asset | 49,100 |  | 49,100 |  | 25,500
Derivative, Gain (Loss) on Derivative, Net | 300 |  | 1,500 |  |
Forward Contracts [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |
Risk participation Agreements [Line Items] |  |  |  |  |
Derivative, Fair Value, Net | 195 |  | 195 |  | 63
Derivative, Notional Amount | 42,000 |  | 42,000 |  | 30,000
Derivative, Gain (Loss) on Derivative, Net | (102) | 201 | 132 | 122 |
Foreign Exchange [Member] |  |  |  |  |
Risk participation Agreements [Line Items] |  |  |  |  |
Derivative, Net Hedge Ineffectiveness Gain (Loss) | 3 | 3 | 15 | 4 |
Interest Rate Contract [Member] |  |  |  |  |
Risk participation Agreements [Line Items] |  |  |  |  |
Derivative, Net Hedge Ineffectiveness Gain (Loss) | 0 | $ 0 | 0 | $ 0 |
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |
Risk participation Agreements [Line Items] |  |  |  |  |
Derivative, Fair Value, Net | (2) |  | (2) |  | 41
Derivative, Notional Amount | 2,362 |  | 2,362 |  | 4,789
Derivative Liability, Cost Basis, Gross Asset | 2,400 |  | 2,400 |  | 4,800
Derivative Liability, Fair Value, Gross Asset | 2,400 |  | 2,400 |  | $ 4,800
2024 [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |
Risk participation Agreements [Line Items] |  |  |  |  |
Derivative, Notional Amount | 30,000 |  | 30,000 |  |
2026 [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |  |  |  |
Risk participation Agreements [Line Items] |  |  |  |  |
Derivative, Notional Amount | $ 40,000 |  | $ 40,000 |  |

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